LOGIN TO YOUR ACCOUNT

Username
Password
Remember Me
Or use your Academic/Social account:

CREATE AN ACCOUNT

Or use your Academic/Social account:

Congratulations!

You have just completed your registration at OpenAire.

Before you can login to the site, you will need to activate your account. An e-mail will be sent to you with the proper instructions.

Important!

Please note that this site is currently undergoing Beta testing.
Any new content you create is not guaranteed to be present to the final version of the site upon release.

Thank you for your patience,
OpenAire Dev Team.

Close This Message

CREATE AN ACCOUNT

Name:
Username:
Password:
Verify Password:
E-mail:
Verify E-mail:
*All Fields Are Required.
Please Verify You Are Human:
fbtwitterlinkedinvimeoflicker grey 14rssslideshare1
Wadge, G.; Costa, A.; Pascal, K.; Werner, C.; Webb, T. (2016)
Publisher: Springer
Languages: English
Types: Article
Subjects:
For 24 h we measured continuously the variability of atmospheric refractivity over a volcano on the tropical island of Montserrat using a ground-based radar interferometer. We observed variations in phase that we interpret as due to changing water vapour on the propagation path between the radar and the volcano and we present them here in the context of the behaviour of the atmospheric boundary layer over the island. The water vapour behaviour was forced by diurnal processes, the passage of a synoptic-scale system and the presence of a plume of volcanic gas. The interferometer collected images of amplitude and phase every minute. From pairs of phase images, interferograms were calculated and analyzed every minute and averaged hourly, together with contemporaneous measurements of zenith delays estimated from a network of 14 GPS receivers. The standard deviation of phase at two sites on the volcano surface spanned a range of about 1–5 radians, the lowest values occurring at night on the lower slopes and the highest values during the day on the upper slopes. This was also reflected in spatial patterns of variability. Two-dimensional profiles of radar-measured delays were modelled using an atmosphere with water vapour content decreasing upwards and water vapour variability increasing upwards. Estimates of the effect of changing water vapour flux from the volcanic plume indicate that it should contribute only a few percent to this atmospheric variability. A diurnal cycle within the lower boundary layer producing a turbulence-dominated mixed layer during the day and stable layers at night is consistent with the observed refractivity.
  • The results below are discovered through our pilot algorithms. Let us know how we are doing!

    • Adler B, Kalthoff N (2014) Multi-scale transport processes observed in the boundary layer over a mountainous island. Boundary Layer Meteorol 153:515-537
    • Barucci A, Macaluso G, Mecatti D, Noferini L, Duccio F, Facchini A, Materassi M, Pieraccini M, Atenzi C (2010) Universal fluctuations in tropospheric radar measurements. Europhys Lett 89(2):20006
    • Bean BR, Dutton EJ (1968) Radio meteorology. Dover, New York, 435 pp
    • Bevis M, Businger S, Herring TA, Rocken C, Anthes RA, Ware RH (1992) GPS meteorology: remote sensing of atmospheric water vapor using the global positioning system. J Geophys Res 97:15787-15801
    • Cécé R, Bernard D, D'Alexis C, Dorville J-F (2014) Numerical simulations of island-induced circulations and windward katabatic flow over the Guadeloupe archipelago. Mon Weather Rev 142:850-867
    • Davison JL, Rauber RM, Di Girolamo L, LeMone MA (2013) A revised conceptual model of the tropical marine boundary layer. Part I: statistical characterization of the variability inherent in the wintertime tradewind regime over the western tropical Atlantic. J Atmos Sci 70:3005-3024
    • Foster J, Bevis M (2003) Lognormal distribution of precipitable water in Hawaii. Geochem Geophys Geosyst 4(7):1065. doi:10.1029/2002GC000478
    • Hanssen R (2001) Radar interferometry: data Interpretation and error analysis. Kluwer, Dordrecht 308 pp
    • Houlié N, Briole P, Nercessian A, Murakami M (2005) Sounding the plume of the 18 August 2000 eruption of Miyakejima volcano (Japan) using GPS. Geophys Res Lett 32:L05302
    • Iannini L, Monti Guarnieri A (2011) Atmospheric phase screen in ground-based radar statistics and compensation. IEEE Geosci Rem Sens Lett 8(3):537-541
    • Iglesias R, Fabregas X, Aguasca A, Mallorqui JJ, Lopez-Martinez C, Gili JA, Corominas J (2014) Atmospheric phase screen compensation in ground-based SAR with a multiple regression model over mountainous regions. IEEE Trans Geosci Remote Sens 52(5):2436-2449
    • Ketzler G (2014) The diurnal temperature cycle and its relation to boundary-layer structure during the morning transition. Boundary Layer Meteorol 151:335-351
    • Kirshbaum DJ, Smith RB (2009) Orographic precipitation in the tropics: large-eddy simulations and theory. J Atmos Sci 66:3678-3694
    • Kirshbaum DJ, Fairman JG Jr (2015) Cloud trails past the Lesser Antilles. Mon Weather Rev 143:995-1017
    • Lu Z, Dzurisin D (2014) InSAR imaging of Aleutian volcanoes. Springer, Heidelberg 390 pp
    • Minder JR, Smith RB, Nugent AD (2013) The dynamics of ascent-forced orographic convection in the tropics: results from Dominica. J Atmos Sci 70:4067-4088
    • Odbert HM, Ryan GA, Mattioli GS, Hautmann S, Gottsmann J, Fournier N, Herd RA (2014) Volcano geodesy at the Soufrière Hills Volcano, Montserrat: a review. In: Wadge G, Robertson REA, Voight B (eds) The eruption of Soufrière Hills Volcano, Montserrat from 2000 to 2010. Geological Society, London, Memoirs, vol 39, pp 195-217
    • Pipia L, Fabregas X, Aguasca A, Lopez-Martinez C (2008) Atmospheric artefact compensation in groundbased DInSAR applications. IEEE Geosci Remote Sens 5(1):88-92
    • Rodriguez LA, Watson IM, Edmonds M, Ryan G, Hards V, Oppenheimer CMM, Bluth GJS (2008) SO2 loss rates in the plume emitted by the Soufrière Hills volcano, Montserrat. J Volcanol Geotherm Res 173:135-147
    • Ruckstuhl C, Philpona R, Morland J, Ohmora A (2007) Observed relationship between surface specific humidity, integrated water vapour, and longwave downward radiation at different altitudes. J Geophys Res 112:D03302. doi:10.1029/2006JD007850
    • Siebesma AP, Bretherton CS, Brown A, Chlond A, Cuxart J, Duynkerke PG, Jiang H, Khairoutdinov M, Lewellen D, Moeng C-H, Sanchez E, Stevens B, Stevens DE (2003) A large eddy simulation intercomparison study of shallow cumulus convection. J Atmos Sci 60(10):1201-1219
    • Smith EK, Weintraub S (1953) The constants in the equation for atmospheric refractive index at radio frequencies. Proc IRE 41:1035-1037
    • Smith RB, Schafer P, Kirshbaum DJ, Regina E (2009) Orographic precipitation in the tropics: experiments in Dominica. J Atmos Sci 66:1698-1716
    • Smith RB, Minder JR, Nugent AD, Storelvmo T, Kirshbaum DJ, Warren R, Lareau N, Palani P, James A, French J (2012) Orographic precipitation in the tropics. Bull Am Meteorol Soc 93:1567-1579
    • Stull RB (1988) An introduction to boundary layer meteorology. Springer, Heidelberg, 666 pp
    • Thayer GD (1974) An improved equation for the radio refractive index of air. Radio Sci 9:803-807
    • Wadge G, Voight B, Sparks RSJ, Cole PD, Loughlin SC, Robertson REA (2014) An overview of the eruption of Soufrière Hills Volcano, Montserrat from 2000 to 2010. In: Wadge G, Robertson R, Voight B (eds) The eruption of Soufrière Hills Volcano, Montserrat from 2000 to 2010. Geological Society, London, Memoirs vol 39, pp 1-39
    • Werner C, Wiesmann A, Strozzi T, Los A, Caduff R, Wegmuller U (2012) The GPRI multi-mode differential interferometric radar for ground-based observations. Proc EUSAR 2012:304-307
    • Wulfmeyer V, Sandip P, Turner DD, Wagner E (2010) Can water vapour Raman lidar resolve profiles of turbulent variables in the convective layer? Boundary Layer Meteorol 136:253-284
    • Young SR, Voight B, Duffell HJ, (2003) Magma extrusion dynamics revealed by high-frequency gas monitoring at Soufriere Hills Volcano, Montserrat. In: Oppenheimer C, Pyle DM, Barclay J (eds) Volcanic degassing. Geological Society, London, Special Publications vol 213, pp 219-230
  • No related research data.
  • No similar publications.

Share - Bookmark

Funded by projects

Cite this article